How many elements make up the majority of Earth's continental crust?
What will be an ideal response?
Answer: 8
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To what three types of modern survivors can the masses of the protogalactic blobs be compared?
What will be an ideal response?
Entropy: A 0.42-kg quantity of ethanol, in the liquid state at its melting point of -114.4°C, is frozen at atmospheric pressure. The heat of fusion of ethanol is 1.04 × 105 J/kg, and its molecular mass is 46.1 g/mol. What is the change in the entropy of the ethanol as it freezes?
A. -280 J/K B. -250 J/K C. -310 J/K D. 250 J/K E. 280 J/K
Why does "banking" (or tilting) a turning road create centripetal force?
a. Because banking the corner keeps cars from going too fast. b. Because the angle of the roadway creates a centrifugal force. c. Because the angle of the roadway creates a centripetal force. d. Because the angle of the roadway helps cars counteract friction. e. Because of friction.
Pluto is both a KBO and a dwarf planet
a. True b. False Indicate whether the statement is true or false